Iowa Trails 2000 maps a statewide trails vision
comprised of 4,908 miles of trails. Of this, 517 miles are already in place.
The remaining 4,391 miles make up the proposed statewide trails vision. Estimating
the cost of this vision depends on two major factors.
First, according to Iowa Trails 2000, the statewide
trails vision will be implemented by a variety of agencies and groups, who
will decide the appropriate modes and surfacing for their particular trail
corridor. As shown in Tables 5-3 through 5-12, trail surface has a great
bearing on trail cost.
Second, the trail costs listed above are affected by inflation.
Trails implemented within the next few years may not see significant unit
cost increases due to inflation. Trails implemented 10 or 20 years from now,
however, may cost more than they would if built today. Due to the extent
of the proposed statewide trails vision, a great number of trail miles could
be affected by inflation.
Table 5-13, therefore, examines the estimated cost of the
statewide system set forth by Iowa Trails 2000 with the following
- Inflation is not taken into account. All costs are in Year 2000 dollars
(see Inflation Costs).
- For the purposes of estimation, and reflecting the Iowa DOTs commitment
to year-round multi-modal use, the estimated system cost is based primarily
on multi-use trails (10 feet wide). These trails are the most expensive,
thereby allowing for a conservative estimate, and they accommodate the greatest
number of use modes, thereby best accommodating all trail users.
Table 5-13 outlines five scenarios for a built-out statewide
trails vision for Iowa, as mapped in Chapter 3.
It is expected that trails in Iowa will have a variety of different surfaces,
reflecting local conditions and desires. As stated above, costs are based
on 10-foot multi-use trails. For this type of trail, two surfaces are commonly
used: asphalt and granular. In the scenarios below, system-wide costs are
based on different proportions of each surface (all granular, half granular/half
asphalt, etc.). Each scenario considers the total mileage of proposed new
trails shown on the statewide trails vision map: 4,391.